This was cute!

The main menu has a "right click to start" prompt, but left click also starts the game. I also found that I frequently accidentally clicked through a couple of letters in the score screen - possibly as a result of mouse up events for clicks that happened before gameplay ended?

I ended up accidentally clicking on the volume settings button when enemies entered the scene from directly above, and found in general that the game felt cramped, with the larger enemies often not being entirely visible on screen before they hit the planet.

I appreciated that there were multiple enemy types to prompt active prioritisation and triaging.

Hope you had a positive experience using Godot, and thanks for doing a Linux build!